What is best way to estimate spouses tax?

Wife is complaining about taxes 🙂

I've entered personal deductions, Business 1099's and retirement income and already owe a lot without her income yet.

No business or home deductions yet.  If I enter her 32K now, will that reflect about what she would owe or is there a better way to enter the numbers in steps?

I just want to give her a fairly accurate guess of what her income costs in taxes.

Appreciated.